셀렉트 박스로 wr_3 필드에 날짜를 전송하고 싶습니다.

<?$wr_3 = @explode("-",$write[wr_3]);$sYear = 2010; //시작 년도$eYear = 2020; //끝 년도?><select name="wr_3_1"> <? for($years=$sYear;$years<=$eYear;$years++) { ?> <option value="<?=$years?>" <?=$wr_3[0] == $years ? "selected" : "" ?>><?=$years?>년</option> <? } ?></select><select name="wr_3_2"> <? for($mth=1;$mth<=12;$mth++) { ?> <option value="<?=sprintf("%02d",$mth)?>" <?=$wr_3[1] == $mth ? "selected" : "" ?>><?=sprintf("%02d",$mth)?>월</option> <? } ?></select><select name="wr_3_3"> <? for($days=1;$days<=31;$days++) { ?> <option value="<?=sprintf("%02d",$days)?>" <?=$wr_3[2] == $days ? "selected" : "" ?>><?=sprintf("%02d",$days)?>일</option> <? } ?></select>

$_POST[wr_3] = $_POST[wr_3_1]."-".$_POST[wr_3_2]."-".$_POST[wr_3_3];sql_query("update {$write_table} set wr_3 = '$_POST[wr_3]' where wr_id = '{$wr_id}'");